Xiao Ming: Hello Dr. Dentistry! My dad said he had a dental cleaning and it was very uncomfortable, sore and numb, and damaged all his teeth, so he vowed never to clean his teeth again. Is my dad right? Dr. Dentistry: Oh, what your dad said may be true, but it is not right to put the blame on dental cleaning. On the contrary, cleaning not only makes your teeth look better, but it is also good for strong teeth and oral health! Just like the electric kettle we boil water in, there will be limescale at the bottom after using it for a long time, so will there be limescale on your teeth, which is tartar. The calculus is attached to the tooth surface, and when the ultrasonic vibrations are transmitted to the teeth, the tartar vibrates off, and these vibrations do not cause harm to the teeth. The sodium salt used in sandblasting is much less hard than tooth enamel, so repeated sandblasting will not damage tooth enamel either. Some people feel that the gap between their teeth is bigger than before, but that is because the original gap is exposed after the removal of tartar and is in no way caused by the scaling. Your father’s allergy to hot, cold and sour after scaling is caused by gum recession and root exposure sensitivity, and it will be fine after a period of time. If there are too many stones on the teeth, it will press the gums to recede then! Therefore, many people think that scaling is harmful to the teeth, which is a misconception that is not true. Dr. Dentistry reminds you that you must choose a regular hospital for teeth cleaning to avoid cross infection and damage and pain caused by improper operation.